Ice-cream cabinet



ICE CREAM CABINET Filed Jan. 2. 1925 Patented July 12, 1927.

* i `UNITED STATES PATENT OFFICE.

CHARLESV'D. RYDER AND CHARLES F. MOORES, OF NEW Y0RK",`YN.4 Y.;" SAID'RYDER .AS- SIGNOR T0 ROTARY BEFRIGERATION, INCORPORATED, OF NEW YORK, N. Y., A COR- POBATION.

ICE-CREAM CABINET.

Application led January 2, 1925. Serial No. 291.

i ice cream is sold, cabinets are used having eil) compartments for the containers and crushed ice packed around the containers. h of ice for this purpose is being discontinued in favor of apparatus of the condenser-expansion gas type, and to discard the` great number of such cabinets that are now in use, would result in' great financial loss. The object of our invention is to utilize these old ice-using cabinets and to do so `without loss of efciency, in protecting their contents from heat absorption,-in deed our invention results in a larger increase of efficiency of the cabinet-s than when `ice isused` Our invention consists .in whatever is described by or is includ-ed within the terms or scope of the claims hereinafter appearing as required by the statute.

In the drawings:

Fig. 1 is a horizontal section of an iceusing cabinet arranged with one embodiment of our invention;

Fig. 2 is a vertical section on line 2-2 ofV Fig. 1;

Fig. 3 isa fragmentary View showing another embodiment of our invention.-

The ice using cabinet has, of necessity, a large space around the ice cream container to accommodate the large quantity of ice that is required and such a cabinet is shown 4in Figs. 1 and 2. Its hollow walls are packed with an insulator of heat.

IVe use precisely the saine cabinet, 10, having` the packed external walls and in the space between such walls and the ice-cream container, we place the expansion coil of` the refrigerating apparatus, the coil having a diameter just large enough to surround or encircle the container, and as shown in Figs. 1 and 2 we place such coil, 12, in a metal shell or sleeve formed of concentric walls, 13 and 14, spaced apart just enough to receive the coil, and in the space between such walls, is placed brine that submerges or envelops lthe coil, and in the spaces Vleft between the sleeve and the externalwalls of the cabinet and between'the sleeves we place a filling, 15, of cork or other heat insulator. Thus, the ice-cream container is surrounded by the coil in the brine, a body of insulation between the coil and the external walls of the cabinet, and by the insulator-containing cabinet walls.

Instead of having the expansion coil in The use the brinecontainer, it may as shown in Fig;

120, the wall,r16, being of a thickness just fh venough to enclose the coil. Y

Referring to Fig. 1, it will bek seen that the pipe forming the coil, 12, passes in a serpentineor sinuous course around the ffrouo of cylinders, and speaking withreference to il?.

the direction of iii-flow of. the fluid, passes partially around one cylinder after the other in succession until the last cylinder, and then completely encircling the latter is assed s eakinof with reference to the return flow of the fiuid, in the opposite direction partially around each of the other cylinders,

.the result being that asto the first cylinder,

speaking with referencev to the direction of-V iiiflow through the coil, the fluid iii its cold- 4' est and warmest state is flowing about theY same upon opposite sides thereof, and the fluid temperature around the `remotest cylinder is a medium temperature and the fluid temperature around tlie intermediate cylinder compensatingly diifers upon opposite portions thereof, so that the mean temperature about all of the cylinders of the group is about the same. With such arrangements of coils for a group of cylinders, as we are familiar with which provide a cold producer in the middle of the group, there exists a ydifference of from 5 to V8 degrees of temperature between ythe cylinders lying near the cold producer and those remotefrom the saine with the result that the cylinders next to the cold producer are too cold or the cylinders farthest away .are too warm for proper ice cream serving.

Another important featureof our invention resides in the thin shell or lilm of brine around the container of ice cream by reason of the close spacing ofthe concentric walls,

13 and 14. As compared with other con-V structions known to us, this thin wall or film `of brine reduces the time for cooling down brine very substantially, as muchas 9() percent, due tothe fact that the volume of brine is about five gallons, instead of sixty gallons. With the ice cream cabinet referred to, `and with which we are conve'rsant, it takes from 48 to 72 hours according to the natural temperature to cool brine down from its in-coming temperature to the proper temperature for ice cream,-

ll (i llO ln-ll while with our construction it takes only about one-tenth that tune. Since the exigencies of the demand for ice cream require speedy lowering of the brine temperature to place the ice cream in the proper conditionA of hardness7 the great value of rapid lowering ot the temperature of the brine will be appreciated.

lVe claiin:

l. A refrineratorcabinet having a refrigerant receiving chamber surrounding a container of substance `to be kept at low teniperaturo, a. coil` closely .surrounding such container and spaced a` Substantial distance from the-interiorof the cabinet walls, and a heat insulatingl inaterial situated in the space between-such chamber and the cabinet walls.

2. A refrigerator cabinet having a plurality of vcontainers for substances to vbe kept at low temperature7 and cooling coils concentric with each container extending from one container to another with portions of coils `arranged for the flow or' cooling inediuin upon opposite sides or' the container whereby the inean temperature about the various containers is substantially the same,

the inlet and outlet portions ot said coils beinguponopposite sides of one of the containers whereby the cooling niediuin at ex treines oi temperature will be adjacent such container.

3.- A refrigerator cabinet having a refrigerant receiving chamber surrounding a container of substance to be kept at low te1nrality of containers for substances to be kept' at low temperature by the action of a flowingy cooling:r inediuin, rneans comprising an inlet. and an outlet i'or such-cooling medium situated on opposite sides of one of the containers whereby the cooling medium at extreines` of'teinperaturc will be adjacent such container, andl forA directing 'How of such cooling inediuin to and about the exterior oteach o'li the other containers in succession 'from said inlet. and from the lastV container to the outlet adjacent the iii-st container,

In testimony whereofl we hereunto affix our signatures.

CHARLES D. RYDER. CHARLES F. MOOR-ES. 

